What is the difference between an acidic, basic and neutral pH?
A solution having a low pH is said to be acidic,
what this means is that it has a higher concentration of hydrogen
ions than a neutral solution. For example, stomach acid has
a pH of around 2.0, this is equal to a concentration of hydrogen
ions equal to 1 x 10-2 mol/L. Any
solution having a pH
less than 7.0 is said
to be acidic.
A basic solution, such as a household cleaner usually
has a pH of around 11. This translates to a concentration
of hydrogen ions equal to 1 x 10-11 mol/L. This
would be considered a lower concentration of hydrogen ions.
Recall from scientific notation that as the exponent becomes a larger
negative number, the numerical value of the expression is less.
Any solution having a pH greater
than 7.0 is said to be basic.
A pH of 7.0 means that a solution is neutral, having
a medium concentration of hydrogen ions. Solutions such as
distilled water have a neutral pH and thus a concentration of 1
x 10-7 mol/L of hydrogen ions in solution. Neutral
solutions have pH values of 7.0 (or very close to 7.0).
to explore how the concentration of Hydrogen ions (pH) in water
will affect the organisms living in that environment.
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